Cleanup: Remove chrome namespace for storage monitor and media galleries.

chrome/browser/media_galleries/scoped_mtp_device_map_entry.cc

Index: chrome/browser/media_galleries/scoped_mtp_device_map_entry.cc
diff --git a/chrome/browser/media_galleries/scoped_mtp_device_map_entry.cc b/chrome/browser/media_galleries/scoped_mtp_device_map_entry.cc
index 822fb033809e3708cc77af1d902332823cecfd9c..59fb4e673d63aec238d37aa10c2d1180d7a96db2 100644
--- a/chrome/browser/media_galleries/scoped_mtp_device_map_entry.cc
+++ b/chrome/browser/media_galleries/scoped_mtp_device_map_entry.cc
@@ -4,8 +4,6 @@
 
 #include "chrome/browser/media_galleries/scoped_mtp_device_map_entry.h"
 
-namespace chrome {
-
 ScopedMTPDeviceMapEntry::ScopedMTPDeviceMapEntry(
     const base::FilePath::StringType& device_location,
     const base::Closure& on_destruction_callback)
@@ -16,5 +14,3 @@ ScopedMTPDeviceMapEntry::ScopedMTPDeviceMapEntry(
 ScopedMTPDeviceMapEntry::~ScopedMTPDeviceMapEntry() {
   on_destruction_callback_.Run();
 }
-
-}  // namespace chrome